Episode 4/6 - Headhunter.

Villa and Tarrant arrive on the planet Pharos to pick up Muller, who has created a powerful
android. However, his creation has turned on him and killed him. Scorpio actually
picks up the android, which is assuming Muller's identity.

The android plans to gain entry to Xenon base and steal Orac, for the combined power of itself
and Orac would make them invincible.